It helped that Todd didn't make it obvious that his signature was in fact supposed to be a signature -- it was not set off in any way but rather simply run in with the last line of his messages as if it were another sentence, which is an unusual idiosyncrasy. You'd be cruising along reading a comment when suddenly, there it was. Todd Lokken.
Like that. It was this characteristic that was found most amusing and worthy of repetition.
Please be nice to Todd, he hasn't done anything worthy of such mockery and doesn't really deserve to be an InJoke.